Definition of ionosonde in English:

ionosonde

noun

Meteorology
  • An instrument for obtaining information about the ionosphere by transmitting a succession of radio pulses into it at different frequencies and recording and analysing their echoes.

Origin

1950s; earliest use found in Monthly Notices of the Royal Astronomical Society. From iono- + sonde.

Pronunciation

ionosonde

/ʌɪˈɒnəsɒnd/